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    <title>Document</title>
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<body>
    <script>
        let arr = [1, 2, 3];
        let [a, c, d] = arr; //即a对应arr[0]对应1,b对应arr[1]对应2,c对应arr[2]对应3;
        console.log(a); //1
        console.log(b); //2
        console.log(c); //3
    </script>
</body>

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